Action

Other biodiversity: Use organic fertilizer instead of inorganic

How is the evidence assessed?
  • Effectiveness
    50%
  • Certainty
    10%
  • Harms
    0%

Source countries

Key messages

Amphibians (0 studies)

Birds (0 studies)

Invertebrates (0 studies)

Mammals (0 studies)

Plants (1 study): One replicated, randomized, controlled study from Italy found more plants and plant biomass, but similar numbers of plant species, in plots with organic fertilizer, compared to plots with inorganic fertilizer.

Reptiles (0 studies)

Implementation options (0 studies)

About key messages

Key messages provide a descriptive index to studies we have found that test this intervention.

Studies are not directly comparable or of equal value. When making decisions based on this evidence, you should consider factors such as study size, study design, reported metrics and relevance of the study to your situation, rather than simply counting the number of studies that support a particular interpretation.

Supporting evidence from individual studies

  1. A replicated, randomized, controlled study in 2007–2013 in a fallow field in Campania, Italy, found more plants and plant biomass, but similar numbers of plant species, in plots with organic fertilizer, compared to inorganic fertilizer. Plants: More plants were found in plots with compost, compared to mineral fertilizer, in one of two years (2013: 1,023 vs 655 individuals/m2). More plant biomass was found in plots with compost, compared to mineral fertilizer, in both years (2012: 401 vs 126; 2013: 301 vs 162 g dry weight/m2). Similar numbers of plant species were found in plots with compost or mineral fertilizer (12–18 species). Methods: Compost was added to four plots (2007–2009: 30; 2010–2013: 15 Mg/ha dry weight). Mineral fertilizer was added to four other plots (NPK fertilizer, twice/year, 50 kg/ha). The plots were 10 x 5 m. The compost was made from municipal solid waste and urban yard trimmings. The compost was added, and plots were tilled, in April each year (20 cm depth). Horticultural crops were grown in 2007–2011. In March 2012 and 2013, all plants (spontaneous growth) were collected from 1 x 1 m quadrats in each plot.

    Study and other actions tested
Please cite as:

Shackelford, G. E., Kelsey, R., Robertson, R. J., Williams, D. R. & Dicks, L. V. (2017) Sustainable Agriculture in California and Mediterranean Climates: Evidence for the effects of selected interventions. Synopses of Conservation Evidence Series. University of Cambridge, Cambridge, UK.

Where has this evidence come from?

List of journals searched by synopsis

All the journals searched for all synopses

Mediterranean Farmland

This Action forms part of the Action Synopsis:

Mediterranean Farmland
Mediterranean Farmland

Mediterranean Farmland - Published 2017

Mediterranean Farmland synopsis

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